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This article describes how to create a basic application and apply the template engine in NodeJS. For more information, see create a node. js server with the most basic functions, it can reflect the node. js workflow and the basic development framework. Requirement: nodejs a
JavaScript lacks a package structure. COMMONJS is committed to changing the status quo, thus defining the package's Structural specification (http://wiki.commonjs.org/wiki/Packages/1.0). The advent of NPM is to solve the problem of package loading, management and versioning, based on the COMMONJS specification. Require the search mechanism is clear, let's look at the details of the package. A package that conforms to the COMMONJS specification should
Recently in the function of doing a file upgrade, you need to specify files from the directory under the download server. After studying zlib, we found that this module could not reach this function.After finding the data found Archiver module is very useful, but I also found that most of the Chinese information is not if the query compression progress, so here to share:Archiver's GitHub Address:Https://github.com/archiverjs/node-archiverAPI Document
Sails is a node. JS middleware architecture that helps us build Web applications easily, URL: http://www.sailsjs.org/, which is developed primarily on the basis of the express framework, expands the new functional components, Let's take a look at the installation methodOne installation sailsNpm-g Install sailsSecond, establish a sails projectNew TestProjectThree startup projectsCD Testprojectsails LiftThe
, loggly, or similar services:function logerrors (Err, req, res, next) { console.error (err.stack); Next (err);}clientErrorHandlerAs defined below, note that the error is passed backwards very clearly.function Clienterrorhandler (Err, req, res, next) { if (req.xhr) { res.send ($, {error: ') Something blew up! ' }); Else { Next (err);} }The following errorHandler "Catch all" exception is defined as:function ErrorHandler (Err, req, res, next) { res.status (+); Res.render (' error '
Fast development and easy to scale, high performance and robust. The advent of node. JS makes these dreams of all Web application developers a reality. However, like other new development language technologies, writing code from scratch using the most basic features of node. JS
Fast development and easy to scale, high performance and robust. The advent of node. JS makes these dreams of all Web application developers a reality. However, like other new development language technologies, writing code from scratch using the most basic features of node. JS
CaseLet's set the goal to a simple point, but it's practical enough: Users can use our app through a browser. When the user requests Http://domain/start , you can see a welcome page with a file upload form on the page. The user can select a picture and submit the form, and then the file will be uploaded to http://domain/upload, which will display the image on the page when the page is uploaded. Almost, you can now go to Google, find something to mess around to complete the
Today, almost all Web services or integrations are done at the node. JS Runtime. node. JS is a flexible platform with a lot of community support. We can even create Xlsx,docx or PDF documents directly from node. js. All major clou
Code management is a very important part of a software application development process, and many programmers need efficient code editing and debugging tools to do their work more accurately and quickly, which may be why there is an IDE (integrated development environment). An IDE has a source code editor, code debugger, code completion function, build automation tools, and compilers in a single software applicatio
Web AppsExpress is a minimalist, flexible Web application Development framework based on the node. JS platform that provides a range of powerful features to help you create a wide variety of web and mobile device applications.ApiRich HTTP shortcuts and any combination of Connect middleware make it fast and easy to create robust, friendly APIs.PerformanceExpress d
/* Accept all the default configurations. */2. Install ExpressNPM Install Express--save3. Installing Express-handlebarsNPM Install Express-handlebars--save4. Create a Server.jsvarExpress = require (' Express ');varApp =Express ();varExhbs = require (' Express-handlebars ')); App.engine (' Handlebars ', Exhbs ({' defaultlayout ': ' Main '}); App.set (' View engine ', ' handlebars '); App.get (‘/‘,function(req, res) {varLucknumber = Math.Round (Math.random () * 10); Res.render (' Index ', {lucknum
for sending messages to the server.Use socket. io and nodejs to build a websocket Server Socket. io can not only build the websocket service of the client, but also support the websocket of the nodejs server.Install socket. io in nodejs Use the node plug-in management package and run the following command to install socket. io successfully. Npm install socket. io If there is no npm or windows users can use github to download socket. io and put it
attributes:Firstchild,lastchild,nextsibling,previoussibling is supported under IESupported under Chrome and FF: firstelementchild,lastelementchild,nextelementsibling,previouselementsiblingIf compatibility is required, we can use short-circuit expressions:1Window.onload =function(){2 varAdiv = document.getElementsByTagName ("div" );3(adiv[2].previouselementsibling | | adiv[2].previoussibling). Style.color = ' Red ';4(adiv[1].nextelementsibling | | adiv[1].nextsibling). Style.color =
What is Express.jsExpress is a simple and flexible node. JS Web application framework that provides a range of powerful features to help you create Web applications, provide rich HTTP tools, and take-out middleware from the Connect framework, creating robust, friendly APIs that are fast and easy, Express does not abstract two times the features that are already i
Bearcat is a POJOs-based application-layer framework developed by NetEase, Bearcat provides a lightweight container to write simple, maintainable node. js. Bearcat provides a basic underlying to manage application logic objects, allowing developers to focus on the logic of the appl
The project background is a php application. To add the instant push function, port 8888 is written in node. js to push instant messages and socket. io is used for data transmission. How can I establish a socket connection between Port 80 and port 8888 on the application page? Node
, function () {/* ... */});//Error monitoring? Client.on ("Error", function (Err) {Console.log ("error" + Err);}); Client.set ("String Key", "string Val", Redis.print),//set "String Key" "String Val"/*redis.print, callback function, displays the return value of Redis. The result of the previous sentence will return "OK" */client.hset ("Hash Key", "Hashtest 1", "some value", redis.print); Client.hset (["Hash Key", "Hashtest 2" , "Some other value"], redis.print);//traversal hash table "Hash key"
File System ModuleFile I/O is encapsulated by standard POSIX functions and requires access to the module using the Require (' FS ')All of these methods provide both asynchronous and synchronous approaches.1. Renaming filesvar base_dir = __dirname; Copied. 2. modify file permissions and file permission properties 3. Get file meta information 4. Read file dataFs.realfile (Path,[callback])5. Verify that the file existsFs.exists (Path,[callback])6. deleting filesFs.unlink (Path,[callback])The cal
Encapsulate ReadFile as a method (to solve asynchronous Problems)Cause: because Node. JS is non-blocking i/o, It is asynchronous, the read file is an I/O request, so it is thrown, and all NON-I/O requests are completed before they are madeCode with Async problem:var fs = require ("fs"); function fnreadfile (file) { function(err, data) { return data; }); Console.log (fnreadfile ("hei.txt")); //
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